Likutei Moharan 21:15/ליקוטי מוהר"ן כ״א:ט״ו

115. It is also possible that there will be a number of tzaddikim who, when they arrive in the World to Come, will find themselves awed by the insights which a tzaddik greater than they comprehended in this world. And they will be singed by [these insights]. But for the great tzaddik, these were insights of this world.

2Likewise, for the gentiles, it will be a great insight for them when they arrive at <the simple intellect of an ordinary, simple Jewish person>, which he has in this world. In other words, they will know of the Jewish people’s devotions and the holiness of the mitzvot which they have, which they performed in this world. For them, this that they will know and experience a little bit of holiness—much as the devout and simple person experiences in this world through a simple devotion, without any insight—will be <a unique and awesome matter>. And when the gentiles will attain this, it will be a great insight for them; whereas [with regard to] us, the holy nation, there is no equal to our comprehension, and certainly not to the comprehension of the tzaddik.